thank you for your positivity redleg. Actually as irony would have it
my understaning of utilization hasn't grown beyond building so much
i.e. my contraptions have gotten smaller. But utilizing techniques...
not so much. Actually a lot of builds I've seen don't really use much
beyond simple logic gates with a few advanced ones here and there.
This is what makes me so certain there is still uncharted territory
oh, and even the experts run into all kinds of interesting little challenges.
i am not great at compacting stuff, just figuring-out basic mechanics (sometimes) thanks to command blocks and comparators, there are all kinds of new stuff, and i've not even scratched the surface of it.
Computers, yeah, i'll stick with what others have said...
Randomizers? many ways, some are even based on mobs and item drops!
I suppose look-up designs on youtube or the likes. But yeah, dropper-hopper randomizers are pretty good, and you could pair them up with binary encoders/decoders to do some fun stuff.
One other thing: compacting circuits may not always be beneficial...
For one, you're potentially screwed if a water/lava leak should occur, or a creeper blast
For another, if you ever need to make changes, well, yeah, it's possible to forget how it works, and harder to reverse-engineer/test it
Lastly, given the means by which redstone circuitry must be compacted, delays can get added, which then sometimes may require further work further along the lines to compensate for.